ANALISA FLUKS KALOR KRITIS PADA PERUBAHAN SUHU PELAT DAN LAJU ALIRAN AIR PENDINGIN UNTUK KASUS PEMANASAN-GANDA DI CELAH SEMPIT REKTANGULAR
Keywords:
boiling, heat, narrow gap, rectangular, flowAbstract
Boiling heat transfer phenomena on rectangular narrow gap was related to the safety of nuclear reactors. Research done in order to study the safety of nuclear reactors in particular relating to boiling heat transfer and useful on the improvement of next-generation reactor designs. The research focused on calculation of the heat flux during the cooling process in rectangular narrow gap size 1.0 mm, with initial temperatures 200 °C, 400 °C, and 600 °C, also the flow rates of cooling water 0,1 liters/second, 0,2 liters/second, and 0,3 liters/second. Experiments carried out by injecting water at a certain flow rate with the water temperature 85 °C. Transient temperature measurement data recorded by the data acquisition system. Transient temperature measurement data is used to calculate the flux of heat gain is then used to obtain the heat transfer coefficient. This research aimed to obtain the correlation between critical heat flux and heat transfer coefficient to changes in temperatures and water flow rates for bilaterally-heated cases on rectangular narrow gap. The results obtained for a constant cooling water flow rate, critical heat flux will increase when hot plate temperature also increased. While on a constant hot plate temperature, coefficient heat transfer will increase when cooling water flow rate also increased. Thus it can be said that the cooling water flow rate and temperature of the hot plate has a significant effect on the critical heat flux and heat transfer coefficient resulted in quenching process of vertical rectangular narrow gap with double-heated cases.
References
Y. Maruyama et al. Application of CAMP Code to Analysis of Debris Coolability Experiments in ALPHA Program. Proceeding of the Workshop on Severe Accident Research (SARJ-98). JAERI-Conf 99-005; 1999.
A.R. Antariksawan. Analisis Degradasi Teras PWR Pada Kejadian Kehilangan Catu Daya. Jurnal Tri Dasa Mega. 2005; Vol. 2, No. 3.
A. Hidaka et al. Analysis of ALPHA in Vessel Debris Coolability Experiments with SCDAPSIM Code. Proceeding of the Workshop on Severe Accident Research (SARJ-98). JAERI-Conf 99-005; 1999.
Kandlikar, S.G. Heat Transfer Mechanisms during Flow Boiling in Microchannels. Journal of Heat Transfer. 2002; 8: 27-35.
https://doi.org/10.1115/ICMM2003-1005
Mulya Juarsa. Study on Boiling Heat Transfer Under Transient Cooling in an Annulus with A Narrow Gap. Master Degree Thesis of Fundamental Energy Science. Kyoto University; 2003.
Mulya Juarsa, Raldi Artono Koestoer, Nandy Putra, Anhar Riza Antariksawan, Indarto, IGN. Bagus Catrawerdana. Experimental Study on the Effect of Initial Temperature to CHF in a Rectangular Narrow Channel with Bilateral-Heated. FTEC2011-The 7th International Conference on Fluid and Thermal Energy Conversion; 2011 September 24 - 27. Zhengzhou, China; 2011
Jian Zhang, Futoshi Tanaka, Mulya Juarsa, Kaichiro Mishima. Calculation of Boiling Curves during Rewetting of a Hot Vertical Narrow Channel. The 10th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-10); 2003 October 5 - 9. Seoul, Korea; 2003.
Fujita. Y., and Yang, Y. Boiling Heat Transfer in Rectangular Channels of Small Gaps. Memoirs of the Faculty of Engineering, Kyushu University. 2002; Vol. 62, No. 4.
Salah El-Din El-Morshedy, Adel Alyan, and Loula Shouman. Experimental Investigation of Natural Convection Heat Transfer in Narrow Vertical Rectangular Channel Heated from Both Sides. International Journal of Experimental Thermal and Fluid Science. 2012; 36: 72- 77.
https://doi.org/10.1016/j.expthermflusci.2011.08.006
Qing Lu, Suizheng Qiu, Guanghui Su, Wenxi Tian, Zhonghao Ye. Experimental Research on Heat Transfer of Natural Convection in Vertical Rectangular Channels with Large Aspect Ratio. International Journal of Experimental Thermal and Fluid Science. 2010; 34: 73-80.
https://doi.org/10.1016/j.expthermflusci.2009.09.004
H.Y. Zeng, S.Z. Qiu, and D.N. Jia. Investigation on the Characteristics of the Flow and Heat Transfer in Bilaterally Heated Narrow Annuli. International Journal of Heat and Mass Transfer. 2007; 50: 492-501.
https://doi.org/10.1016/j.ijheatmasstransfer.2006.07.021
Md. Ashraful Islam, Masanori Monde, Peter Lloyd Woodfield, Yuichi Mitsutake. Jet Impingement Quenching Phenomena for Hot Surfaces Well above the Limiting Temperature for Solid-liquid Contact. International Journal of Heat and Mass Transfer. 2008; 51: 1226- 1237.
https://doi.org/10.1016/j.ijheatmasstransfer.2007.01.059
Jun Huang et. al., Numerical Study on Effect of Gap Width of Narrow Rectangular Channel on Critical Heat Flux Enhancement. International Journal of Nuclear Engineering and Design. 2009; 239: 320-326.
https://doi.org/10.1016/j.nucengdes.2008.11.007
L. Tadrist. Review on Two-Phase Flow Instabilities in Narrow Spaces. International Journal of Heat and Mass Transfer. 2007; 28: 54-62
